October 31, 1914 
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Vol. XXVII, pp. 199-200 
PROCEEDINGS 
OK THE 
BIOLOGICAL SOCIETY OF WASHINGTON 
A NEW SNAKE FROM NORTHERN BRAZIL. 
BY THOIMAS BAKBOUR. 
While recently examining the specimens of the genus Elapo- 
morphus preserved in the Museum of Comjiarative Zoology, I 
found a single specimen which I am unable to identify with 
any of the species of the genus hitherto described. It may be 
distinguished at once by its striking type of coloration and by 
its extremely small number of ventral scales. It may be 
known as 
Elapomorphus nuchalis sp. iiov. 
Type, a single specimen from Villa Bella on the Amazon River, above 
Santarem, Brazil, Mns. Comp. Zool. No. 1164, collected and presented by 
Rev. J. C. Fletcher in 1863. 
Rostral a little l)roader than deep, jnst visible from above; internasals 
much .shorter than the praefrontals, not over one-third their length; 
frontal once and a half time.s as long as broad, a little longer than its 
distance from the end of the snont, mnch shorter than the parietals, winch 
are about once and a half times as long as broad; one prae- and two 
postoctdars; temporals 1 pins 3; 7 upper labials, third and fonrtli enter- 
ino' the orbit; 4 lower labials in contact with the anterior chin shields, 
which are mnch longer than the posterior. Scales in 15 rows. Ventrals 
147; anal divided; tail imperfect. Tawny brown above, finely dotted 
with darker; three very indistinct darker longitudinal lines wliich are 
jnst visible on the nape region disappear along the body and reappear 
npon the posterior extremity of the body and on the tail; tip of snont 
yellow, with small black spots; top of head from internasals to and in- 
clnding anterior two-thirds of parietals dark brown, i)Osterior extremities 
of parietals and temporals included in an extension npward of the creamy 
white of the throat; these markings, however, do not meet above, bnt 
are separated by a narrow isthmus which connects a broad dark nuchal 
collar with the dark top of the head; nnchal collar not extending below 
tbe sides of the neck; bordered behind with cream color; lip region with 
(199) 
37—Pkoc. Biol. Soc. Wash., Vol. XXVri,19M. 
